-----Original Message-----
From: Liang, Prike <redacted>
Sent: Tuesday, January 19, 2021 9:49 AM
To: linux-usb@vger.kernel.org
Cc: mathias.nyman@intel.com; Liang, Prike <redacted>
Subject: [PATCH] usb: pci-quirks: add XHCI_COMP_MODE_QUIRK for
disabling amd xhci D3cold

During xhci suspend some AMD USB host will lose port status change events
and need to have the registers polled during D3, so now just avoid D3cold.

Signed-off-by: Prike Liang <redacted>
---
 drivers/usb/host/xhci-pci.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index

3feaafe..bff817a 100644

--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c

@@ -170,6 +170,11 @@ static void xhci_pci_quirks(struct device *dev, struct

xhci_hcd *xhci)
 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_1)))
 xhci->quirks |= XHCI_U2_DISABLE_WAKE;

+if (pdev->vendor == PCI_VENDOR_ID_AMD &&
+pdev->device == 0x1639) {
+xhci->quirks |= XHCI_COMP_MODE_QUIRK;
+}
+
 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
 xhci->quirks |= XHCI_LPM_SUPPORT;
 xhci->quirks |= XHCI_INTEL_HOST;
--
2.7.4